Inverted incandescent gas-lamp.



M` GRAETZ. INVBRTED INGANDESGBNT GAS LAMP. APPLICATION FILED JAN. 5,1910.

1,030,079-, Patented June 18, 1912.

4 SHEETS-SHEET 1.

COLUMBIA PLANDGIAPK C.. WASHINGNN. D. C.

M. GRAETZ. INVBRTBD INGANDESGENT GAS LAMP. APPLICATION FILED Mlm, 1910.

1,030,079, Patented June 18,1912.

4 SHEETS-SHEET 2.

CDLUMBM PLANUGRAPH C0.. WASHINGTON. D. C.

M. GRAETZ. J

INVERTED INGANDESGENT GAS LAMP.

APPLICATION FILED JAN.5, 1910.

1,030,079, Patented June 18, 1912.

I, 4 SHEETS-SHEET 3.

WMM,

fijar/@g cuLUMBM PLANOGRAPH Co.. WASHINGTON, D. c.

M, GRAETZ. INVERTED INGANDESGENT GAS LAMP.

APPLICATION FILED JAN.5,.1910.

Patented June 18, 1912.

4 SHEETS-SHEET 4.

:oLUMBlA PLANOGRAPM co..WASH!Na10N. D C.

11N lTED STATES MAX GRAETZ, O'F BERLIN, GERMANY.

INVERTED INGANDESCENT GAS-LAMP.

Specification of Letters Patent.

Patented J une 18, 1912.

Application filed January 5, 1910. Serial No. 536,510.

To all whom t may concern.'

Be it known that I, MAX GRAETZ, a subject of the King of Prussia, GermanEmperor, and resident of 92/93 Elsenstrasse, Berlin, German Empire, haveinvented certain new and useful Improvements in Inverted IncandescentGras-Lamps, of which the following is a specification.

rlhis invent-ion relates to inverted incandescent gas lamps especiallysuch as are intended to be employed in the open air and to work withpressure gas or with pressure air. The lamps herein described howevermay also be employed for ordinary pressures.

'Ihe object of the present invention is to construct a lamp which may beeasily dismantled and in which those parts requiring frequent attentionand adjustment are easily accessible without dismantling the lamp in anyway. For instance, the nozzles of the burner which require frequentadjustment and attention may be readily removed without disturbing thelamp parts.

Further it is sought to improve the operation of the lamp by theimproved constructions hereinafter described.

The invention will be more readily under'- stood from vthe followingparticular descript-ion of the accompanying drawings which illustratefour modifications of the present invention by way of example.

In these drawings, Figure 1 is a vertical cross-section through amultiple-burnerI lamp intended to work with pressure gas. Fig. 2 is aVertical cross-sect-ion through a similar lamp intended to work withpressure air. Fig. 3 is a vertical cross-section through apressure-gas-lamp, similar to that of Fig. 1 but having a somewhataltered arrangement of the air feeding parts and of the burner tubes.Fig. 4: is a vertical cross section through a further modiliedconstruction of a multiple-burner-lamp for pressuregas.

The same or similar reference numbers denote the same or similar partsin the dif ferent figures.

In carrying the invention into effect according to the first form shownin Fig. 1 the lamp casing consists of an upper cover part 1, acylindrical main casing or chim` ney part2 and a casing-underpart 3.Above the upper part 1 there is arranged a cast upper structure 5 inwhich the air suction chambers 6 and 7 are formed. Screwed into theupper structure and opening from the suction chambers 6 and 7 are twostraight vertical burner tubes S and 9. The vertical burners 8 and 9pass through bosses 52 formed in a cast understructure comprisingradiating arms 10 and 11 connected at their outer ends by a ring orflange 12. The flange 12 extends under the lower part 3 of the lampcasing so that by tightening up the nuts 13 and 14 on the lower parts ofthe straight burner tubes S and 9 the upper structure 5 and the lowerstructure 10, 11, 12 are firmly bound together with the lamp parts l, 2and 3. The ends of the straight burner tubes Sand 9 are threaded belowthe nuts 18 and 14 to receive the mixture heating chambers 15 and 16which are of the elongated widened form shown. The mixmg chambers 15 and1G have their exits directly into the burner heads on which the mantles17 and 1S are arranged. To a bracket formed on the lower cast structurethere is pivoted at 22 a ring 19 adapted to support the glass shade 20.The ring 19 has also fixed to it the reflector 4L. A catch 21 pivoted tothe lower cast structure and arranged opposite to the pivot 22 isarranged to hold the globe of the shade 20 and ring 19 in place. To theflange 12 there is fixed a reflector plate 30 arranged within the glassshade 20. y Cast with the upper structure 5, in the form shown, is acockwbarrel 23 to which gas is led by the pipe connection 241. Aroundthe cock-barrel 23 there is arranged a rotatable channeled sleeve 53which is adapted in one position to establish connection between the gassupply pipe 211 and the gas supply channels 25 leading to the nozzles 27and 28 and in another position to cut olf communication between thesupply 24 and the channels 25.

The channeled sleeve 53 is adapted to be rot-ated by a rod 2G. Thechannels 25 as aforesaid lead to the nozzles 27 and 28 which `areadapted to be screwed int-o t-he cast `upper structure 5 and projectinto the suction chambers 6 and 7, of the burner tubes S and 9. By thisarrangement the said nozzles 27, 28 may be removed from the upperstructure 5 for cleaning and adjustment wit-houtdisturbing any otherpart of the lamp. Leading to the suction chambers 6 and 7 there are alsoair supply pipes 31. and 32. In the illustrated form these pipes 31, 32or equivalent passages in the upper 6 and 7 screws 35 and 3G carryingdisks 87- and 38 are arranged where the pipes 33 and l'34 communicatewith the cast upper structure. i

In order to make the lamp storm-proof, the upper cast structure isprovided with annular ridges 54, arranged concentrically )with thebosses 5G, 57 to which the burner tubes 8 and 9 are fixed. The annularridges 54 press on the cover plate 1 of the lamp casing and the saidcover plate is turned up near the edges of the holes through which thebosses for the burner tubes pass, as can be seen in Fig. 1. In this wayrain is prevented from obtaining access to the interior of the lamp.

In addition to the advantages mentioned "the lamp possesses the greatadvantage of simplicity in structure and enables the application ofstraight burner tubes which, as is known, offer least resistance whileat the same time the objections usually associated 'f fwith straightburner tubes are avoided. In

order to secure a suflicient air suction to the lamp it is necessarythat the air should be rather cool, that is to say, that the air shouldnot be expanded by heat. Experience has shown that the air isconsiderably warmed even when it is exposed over a very short stretch ofits path to heat. By arranging the mixing chamber or suction chamberexternally and above the lamp a Vconsiderable advantage in this respectis obtained as the mixing chamber, being in the open air, readily givesup its heat and thereby remains comparatively cool. Further this act-ionis considerably increased by forming the mixing chamber not out of sheetmetal but out of comparatively thick walled cast metal which permits ofvery rapid conduction of the heat. This action is further enhanced byforming the cock barrel and air conduit pipes of a single casting havingcomparatively thick walls. Such a casting rapidly conducts the heat toall parts of the same and thereby a very extensive coolino' surface isoffered. Also, by arranging the tubes 33 and 34 well below the openings29 the objections associated with the suction of air from a point abovethe chimney openings are avoided, while at the same time by employingthe downwardly opening pipes the act-ion of the lamp is not disturbed bywind.

Many alterations may be made in the conthe same as that described inFig. 1.

struction of theV lamp without departing from the principle of thisinvention, for

example, it is sometimes advisable that the air conduction pipes 33, 34be arranged to project within the chimney-casing 2 and withdraw air fromsome part or chamber formed Within the said casing and closed off fromthe burnt gases, as hereinafter described with reference to Fig. 8.

`According to the form sho-wn inl Fig. 2 the lamp is intended to workwith pressure air While the gas is under normal pressure. Theconstruction of the lamp is in general Above the cover 1 of the lampthere is arranged the coclcbody 28 which has passages 47, 48', leadingto the mixing chambers 6 and 7 To the mixing chambers 6 and 7 areconnected the straight vertical burner tubes 8" and 9. The lower caststructure is of similar construction to that shown at Fig. 1, andcarries the ring 12,which is arranged to engage the lower casing part 8,and the upper cast structure which is united with the cock-body 28engages the upper-casing part 1, the casing parts 1, 2, 8', being heldtogether by the nuts 13, 14 on the lower ends of the straight burnertubes 8 and 9. The heating chambers 15, 16 for the mixture, the burners17, 18, the reflector 4, the shade-globe 20 and t-he reflector plate 80are arranged as described with reference to Fig. 1. The gas in this caseenters by the pipe 24 and passes into the channels 25 which opendownwardly into a watercollecting tube 250 closed by a screwed plug 251and branch into the mixing chambers 6, 7 cocks 45 and 46 beinginterposed in said branches. The passages in the cocks 45 and 46 are sodimensioned as to insure the correct proportioning of the mixturepassing through the mixing tubes 8 and 9.

The pressure air is fed sidewise by connections not illustrated to theannular channel 47. From this annular channel the compressed air passesthrough passages 48 and 49 to the nozzles 27 and 28. Ihe nozzles 27 and28 are accessible in the same manner as the nozzles described in Fig. 1and project into the suction chambers 6 and 7 opposite the burner tubes8 and 9. Around the burner tubes 8 and 9 there are arranged tubes 50 and51 which open at their upper ends into the suction chambers 6, 7 andopen at their lower ends into other chambers 58', 59, formed in thelower cast structure and the said chambers are connected by the hollowradiating arms 41 and 42 and the windows 61, 62 in the Lipper wall ofthe ring-Harige 12 with the external air. In consequence thereof airpasses in the direction shown by the arrows through the windows, andhollow radiating arms and upward through the annular space between theburner tubes' 8 and 9 andthe outerA 161" into the ring-shaped room tubes50' and 51'. Owing to the heating action of the gases rising through thecasing or chimney 2' this upward current is to some extent accelerated.

The conduction of t-he air into the suction chamber by means of passageswhich are heated more or less by the waste gases and thro-ugh a tubesurrounding the burner tube and many other details of the lamp which isillustrated, may be known. The main novelty in the present construction,according to Fig. 2, resides in the peculiar arrangement of the nozzles27', 28' at an easily accessible place and in providing a passage foradditional air arranged as described and adapted to open into a suctionchamber which sarranged above the lamp casing and exposed to theatmospheric air. In this way the somewhat heated-air rising through theannular space bet-Ween the burner tubes 8' and 9' and the outer tubes50', 51' is cooled and such cooling is of great advantage in providing aproper mixture. It is not necessary however that the tubes 50 and 51'surround the burner tubes; as they may if desired be arranged separatelyor the mixing chambers 6' and 7' may be supplied with additional air bymeans of a common pipe.

In the altered embodiment according to Fig. 3 the cover 1", the castpiece 5", the outer-casing 2" and the casing-underpart 3" are fastenedto one another by the mixing tubes 8" and 9" in a similar manner to thatshown at Fig. 1. The reflector 4" and the glass-shade 20" are alsoarranged and fastened to the casing-underpart 3" in the manner describedabove. Also the feeding of the pressure-gas through the tube 24", theconduction of the gas through the grooves in the cock-casing 23", andthrough the bores 25" to the nozzles 27" and 28" and furt-her to themixing' tubes 8" and 9" is similar to that in the rst example. Adistinguishable feature however consists in the fact, that within theouter chimney casing 2" a cylinder or tube of smaller diameter 150" isarranged, and that the reflector plate 130" is fastened to the lower endof said cylinder 150", so as to form an outer ringshaped room 151", anda central cylindrical room 152". The ring-shaped room 151" is closed atits upper end and through the closing plate air tubes 133" and 134" passinto the mixing chambers 6" and 7 The fresh air to be fed enters throughthe windows 151", and by the outer shelter 162" the entrance of rain orwind into said room, which might disturb the action of the lamp isprevented. Then, in rising within the room 151" the fresh air is heatedto some degree, as it advanoes comparatively slowly in consequence ofthe larger contents of this room. From the upper end of the room 151"the heated air passes through the tubes 133" and 134" 'into the mixingchambers 6" and 7", the

lwhere they cross the fresh air feeding tubes 133", 134" and finallyleave the lamp under `the lower brim of the cover part 1". The

waste gases, in rising within the room 152" considerably heat the mixingtubes 8" and 9" and the partition-wall 150" between the rooms 151" and152".

In the modification of the gas-lamp according to Fig. 4 the outerarrangement of the upper part 1"', the outer casing 2"', the casingunderpart 3"', the reflector 4"' and the glass-shade 20"' is similar orthe same as in the previous examples. Pressure gas is fed through thetube 24"' and conducted through the channels 25"' to the two or moreburners within the lamp. In each of these channels 25' there is arrangeda cock 65"', 66"', the upper parts of which 63"', 64"' bear theregulating rods 26"', which rods allow each of these burners to beindependently lighted or extinguished, without interfering with theother burners. The cast upper structure 5"', in which the channels 25"'with the regulating cocks are arranged, is continued in the present caseby tubes or the like 67 and 68"' to the mixing-chambers 106' and 107which are arranged comparatively low wit-hin the lamp. The nozzles 27"',28"' which are arranged within the tubes 67"', 68"' also lead with theirlower hollow stems 127', 128' into the mixing chambers 106', 107'.previous example there is arranged an inner partition wall 150' withinthe outer casing 2', in 'order to divide the chimney-part again into aring-shaped outer-room 151' and a central cylindrical room 152'. Thecuter ring-shaped room 151' which is closed at its lower end by therefiector plate 130' and which is likewise closed at its upper end, issupplied with fresh airby the windows 161', which windows are protectedagainst rain or wind by the outer shelter 162'. The air rises slowlywithin this ring-shaped room 151' to the mixing chambers 106', 107',into which it enters through windows in a side prolongation and throughcorresponding windows of an inner shell 137', 138', within therespective prolongations of the mixing chambers 106', 107'. By an outerscrew 35"', 36"' the adjustment of the shells As in the 137", 138' andconsequently the admission of air to the mixing chambers can be altered.The burnt or waste gases rise likewise in this example in the centralroom 152'", thereby heating the mixing tubes 8', 9', the mixing chambers,106, 10 and the partition wall 150', which in its turn again heats thefresh air which is fed to the mixing chambers. rlhe waste gases thenturn to the side at the top of the chimneypart and leave the lamp belowthe outerbrim of the cover 1.

It will be understood, that the invention may be similarly applied tosingle burnerlamps or to lamps containing two or more than two burners,by simple duplication ot' the parts. Further it is clear that instead ofone fresh air supplying ring-room several air supplying chambers may bearranged in a manner similar to that shown at Fig. 2. The mixingchambers and the mixing tubes may be arranged either in thewaste-gascontaining room, as shown at Figs. 3 and 4, or in thefresh-air-containing room, as shown at Fig. 2. The mixing tubes may beprovided with special heating chambers for the mixture near the burners,as shown at Figs. l and 2.

It will oi course be understood that the invention is capable of readymodification without departing from the spirit of the invention, as themain feature of the present invention consists in such an arrangementot' the regulating nozzles that these parts, which require greatestattention and frequent adjustment, may be adjusted, taken out andsubstituted by another one without requiring the dismantling of theother parts of the lamp.

I claim:

l. In combination with an inverted incandescent gas lamp having an outercasing, a cover therefor, means for admitting air to and for the exit ofhot gases from the interior of the outer casing, a mixing chamber towhich air is supplied, and a mixing tube depending vertically from themixing chamber and communicating therewith and with the burner; a hollowcasting mounted above said cover and connected with the gas servicepipe, and a vertically arranged gas nozzle intermediate andcommunicating with said mixing chamber and service pipe, said gas nozzlebeing screwed, from above, into said casting in alinement with saidmixing tube so as to deliver the gas thereinto and so as to be directlyaccessible for removal purposes trom above the lamp without displacingany of the other parts of' the lamp.

2. In combination with an inverted incandescent gas lamp having an outercasing, a cover therefor, means for admitting air to and for the exit ofhot gases from the interior of the outer casing, a mixing chamber towhich air is supplied, and a mixing tube depending vertically from themixing chamber and communicating therewith and with the burner; a hollowcasting mounted above said cover and connected with the gas servicepipe, said mixing chamber being located in said casting, vertical airsupply tubes communicating at one end with said mixing chamber and openat the other end to the atmosphere and a vertically arranged gas nozzleintermediate and communicating with said mixing chamber and servicepipe, said gas nozzle being screwed, from above, into said casting inalinement with said mixing tube.

3. In combination with an inverted incandescent gas lamp having an outercasing, a cover therefor, means for admitting air to and for the exit ofhot gases from the interior of the outer casing, a mixing chamber towhich air is supplied, and a mixing tube depending vertically from themixing chamber and communicating therewith and with the burner; a hollowcasting mounted above said cover and connected with the gas servicepipe, said mixing chamber being located in said casting, vertical airsupply tubes passing through the interior of the lamp so as to be heatedby the hot gases therein and communicating at one end with-said mixingchamber and open at the other end te the atmosphere and a verticallyarranged gas nozzle intermediate and communicating with said mixingchamber and service pipe, said gas nozzle being screwed, from above,into said casting in alinement with said mixing tube.

4. In combination with an inverted incandescent gas lamp having an outercasing, a cover therefor, means for admitting air to and for the exit ofhot gases from the interior of the outer casing, a mixing chamber towhich air is supplied, and a mixing tube depending vertically from themixing chamber and communicating therewith and with the burner; a hollowcasting mounted above said cover and within which said mixing chamber islocated, a cock barrel integral with said casting, gas passages in saidcock barrel and casting and communicating with said mixing chamber, andan annular ad- -justable valve surrounding said cock barrel forcontrolling the supply of gas to Vsaid passages. v

5. In combination with an inverted incandescent gas lamp having an outercasing, a cover therefor, means for admitting air to and for the exit ofhot gases from the in' terior ot the outer casing, a mixing chamber towhich air is supplied, and a mixing tube depending vertically Jfrom themixing chamber and communicating therewith and with the burner; a hollowcasting mounted above said cover and within which said mixing chamber islocated, a cock barrel integral sof with said casting, gas passages insaid 000k zle being screwed, from above, into said barrel and castingand communicating With casting in alinement With said mixing tube. 10said mixing chamber, an annular adjustable In Witness whereof I havehereunto set valve surrounding said 000k barrel for conniy hand in thepresence of tivo Witnesses.

trolling the supply 0f gas t0 said passages MAX GRAETZ. and a verticallyarranged gas nozzle inter- Witnesses:

mediate and communicating with said inix- HENRY HASPER,

ing chamber and gas passages, said gas noz- VVOLDEMAR HAUPT.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.4

